What is the best way to iterate over the lines of a Java String?

Question

Currently I\'m using something like :

String[]lines = textContent.split(System.getProperty(\"line.separator\"));
for(String tmpLine : lines){
   //do somethi         


        

Answer 1

If you are using Java 1.8 (or Android) then try this:

new BufferedReader(new StringReader(str)).lines().forEachOrdered((line) -> {
    // process each line as you like
});

Docs state

The Stream is lazily populated, i.e., read only occurs during the terminal stream operation.

Which means this runs quicker than other solutions that first generate a massive array of Strings before iteration can begin.

If you are using Java 11 or later then the answer @Naman gave recommending String#lines() method is even cleaner and fast as well, see https://stackoverflow.com/a/50631579/215266